基板合成矩形波導之帶通率波器

Substrate-Integrated Rectangular Waveguide Bandpass Filters

簡誌亨(Jhih-Heng Jian)

指導教授 ： 陳俊雄

國立臺灣大學/電機資訊學院/電信工程學研究所/碩士(2007年)

https://doi.org/10.6342/NTU.2007.00885

摘要

本篇論文採用兩種不同的方法在印刷電路板中構成垂直金屬壁，來形成基板合成波導帶通濾波器，實作了數種單層基板合成矩形波導帶通濾波器的架構，並實現在Ro4003上。
首先用Ro4003印刷電路板製作三階帶通濾波器，並以K反轉器的方式設計，其中的共振器用二分之一波長導波管，等效導波管的垂直金屬壁是用銀膠來實現，為了量測，在其兩旁作了一個轉接電路，轉接到50歐姆微帶線。
另一種設計為矩形波導共振腔的垂直金屬壁是以金屬連通柱列來等效，共振腔用類似共平面波導(CPW)的槽線激發，將饋入電路與輸入、輸出端共振腔整合在一起，簡化饋入電路。本論文設計四階矩形共振腔帶通濾波器，利用耦合係數的方法來設計，選擇最大平坦響應、線性相位響應。最後用三角形共振腔取代矩形共振腔以求縮小電路面積，並分別設計一個三階帶通濾波器、一個六階帶通濾波器，分別使用柴比雪夫、最大平坦響應。

關鍵字

濾波器 ； 帶通 ； 基板合成波導

並列摘要

This thesis uses two kinds of methods to construct vertical metal walls in printed circuit board (PCB), thereby forming the substrate integrated waveguide (SIW) bandpass filters. Several filters are designed by those structures , using the PCB of Ro4003.
Firstly, a three-pole bandpass filter is constructed, using the method of K-inverter. The resonator is made of a half-wavelength rectangular waveguide. The vertical metal walls of the waveguide are realized by the silver glue. For the purpose of measurement, a transition circuit to transform rectangular waveguide to 50ohm microstrip line in both ports of waveguide is designed.
Another design uses the via-holes to construct the vertical metal walls, thereby realizing the rectangular resonant cavities. For excitation, the input and output resonant cavities are fed by the properly designed slotline-to-waveguide transition circuits. The filter is designed by the method of coupling coefficient and the frequency responses are Butterworth and linear phase. Lastly, the rectangular resonant cavities are replaced by triangular resonant cavities so as to reduce the circuit area. Specifically a three-pole bandpass filter and a six-pole bandpass filter with Chebyshev and Butterworth responses are implemented and examined.

並列關鍵字

filters ； bandpass ； SIW

參考文獻

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